Messages in this thread Patch in this message | | | Date | Fri, 8 Dec 2006 16:07:08 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | [RFC] [PATCH] virtual memmap on sparsemem v3 [3/4] static virtual mem_map |
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This patch adds support for statically allocated virtual mem_map. (means virtual address of mem_map array is defined statically.) This removes reference to *(&mem_map).
Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: devel-2.6.19/include/linux/mmzone.h =================================================================== --- devel-2.6.19.orig/include/linux/mmzone.h 2006-12-08 15:04:30.000000000 +0900 +++ devel-2.6.19/include/linux/mmzone.h 2006-12-08 15:05:18.000000000 +0900 @@ -618,8 +618,13 @@ #if (((BITS_PER_LONG/4) * PAGES_PER_SECTION) % PAGE_SIZE) != 0 #error "PAGE_SIZE/SECTION_SIZE relationship is not suitable for vmem_map" #endif +#ifdef CONFIG_SPARSEMEM_VMEMMAP_STATIC +#include <linux/mm_types.h> +extern struct page mem_map[]; +#else extern struct page* mem_map; #endif +#endif static inline struct page *__section_mem_map_addr(struct mem_section *section) { Index: devel-2.6.19/mm/Kconfig =================================================================== --- devel-2.6.19.orig/mm/Kconfig 2006-12-08 15:05:10.000000000 +0900 +++ devel-2.6.19/mm/Kconfig 2006-12-08 15:05:18.000000000 +0900 @@ -121,6 +121,10 @@ But this consumes huge amount of virtual memory(not physical). This option is selectable only if your arch supports it. +config SPARSEMEM_VMEMMAP_STATIC + def_bool y + depends on ARCH_SPARSEMEM_VMEMMAP_STATIC + # eventually, we can have this option just 'select SPARSEMEM' config MEMORY_HOTPLUG bool "Allow for memory hot-add" Index: devel-2.6.19/mm/memory.c =================================================================== --- devel-2.6.19.orig/mm/memory.c 2006-12-08 15:03:02.000000000 +0900 +++ devel-2.6.19/mm/memory.c 2006-12-08 15:09:00.000000000 +0900 @@ -71,7 +71,9 @@ #ifdef CONFIG_SPARSEMEM_VMEMMAP /* for the virtual mem_map */ +#ifndef CONFIG_SPARSEMEM_VMEMMAP_STATIC struct page *mem_map; +#endif EXPORT_SYMBOL(mem_map); #endif - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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